PartyBus CI remediate Fortify

Research and remediate Fortify scan findings for keycloak plugin in PB IL2 CI pipeline.
https://fortify.il2.dso.mil/html/ssc/version/1121/fix/d0/s0?filterSet=a243b195-0a59-3f8b-1403-d55b7a7d78e6
Open PB ticket for "review and disposition" for any unresolved findings.

Locally test build and run unit tests

docker run -it --rm -v $(pwd):/app registry1.dso.mil/ironbank/opensource/gradle/gradle-jdk11:7.4.2 bash
cd /app
gradle clean
gradle --build-cache assemble
gradle test --info